package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

//    新增套餐及套餐下菜品
    @Override
    public void saveSetmealWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

//        向套餐表插入数据
        setmealMapper.save(setmeal);
        //获取生成的套餐id
        Long setmealId=setmeal.getId();

//        新增套餐下多个菜品
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

//    分页查询套餐
    @Override
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum,pageSize);
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

//    删除套餐
    @Override
    public void delete(List<Long> ids) {
        ids.forEach(id ->{
            Setmeal setmeal=setmealMapper.getById(id);
            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

//    修改套餐
    @Override
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //        1.修改套餐表
        setmealMapper.update(setmeal);

        Long setmealId=setmeal.getId();

//        2.删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);

    }

//    根据id查询套餐及套餐下菜品
    @Override
    public SetmealVO getByIdWithDish(Long id) {
//        根据id查询套餐表
        Setmeal setmeal = setmealMapper.getById(id);
        //根据套餐id查询套餐下菜品
        List<SetmealDish> setmealDishes=setmealDishMapper.getBysetmealId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

//    起售停售套餐
    @Override
    public void startOrStop(Integer status,Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status==StatusConstant.ENABLE){
            List<Dish> dishes=dishMapper.getBySetmealId(id);
            if (dishes!=null && dishes.size()>0){
                dishes.forEach(dish -> {
                    if (dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

//    根据条件查询套餐
    @Override
    public List<Setmeal> getByCategoryId(Setmeal setmeal) {
        List<Setmeal> setmealList=setmealMapper.list(setmeal);
        return setmealList;
    }

//    根据套餐id查询包含的菜品
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        List<DishItemVO> list=setmealMapper.getDishItemBySetmealId(id);
        return list;
    }
}
